Bottle cap



FIG. 1 is a perspective view of the bottle cap;

FIG. 2 is a front plan view of the bottle cap;

FIG. 3 is a side plan view of the bottle cap; and,

FIG. 4 is a top plan view of the bottle cap.

The bottom and interior of the closure form no part of the claimed design. 

The ornamental design for a bottle cap, as shown and described. 